The San Francisco startup helps people rent their places out to visitors by providing them a template to post pictures and a ready-made market of interested travelers. It then takes a 10% cut of each sale.

A few months ago, Airbnb moved into a new office in the sunny Potrero Hill neighborhood. The company is proud of its crazy new design, and while it's closed to tours, they were willing to share some photos with us.

Most impressive: the conference rooms were designed after listings on the site, like this mushroom-shaped cabin.